(D) When the capacitor is disconnected from the source,the charge $Q$ on the plates remains constant because there is no path for the charge to flow.T

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The potential difference across the plates increases.

(D) When the capacitor is disconnected from the source,the charge $Q$ on the plates remains constant because there is no path for the charge to flow.The capacitance of a parallel plate capacitor is given by $C = \frac{\epsilon_{0} A}{d}$.If the distance $d$ between the plates is increased,the capacitance $C$ decreases.The potential difference $V$ across the plates is given by $V = \frac{Q}{C}$.Since $Q$ is constant and $C$ decreases,the potential difference $V$ must increase.Therefore,option $D$ is correct.

Class 12 Physics Electrostatic Potential and Capacitance Effect of Dielectric Inside Capacitor

Medium

$A$ parallel plate capacitor is charged and then disconnected from the source of potential difference. If the plates of the capacitor are then moved farther apart by the use of an insulated handle,which one of the following is true?

A
The charge on the capacitor increases.
B
The charge on the capacitor decreases.
C
The capacitance of the capacitor increases.
D
The potential difference across the plates increases.

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Electrostatic Potential and Capacitance

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Effect of Dielectric Inside Capacitor

Four metallic plates $A, B, C$ and $D$ of the same size with the same separation between them are arranged as shown in the figure. Dielectric slabs of dielectric constant $K = 2$ are placed between $B, C$ and $C, D$ respectively. Plates $B$ and $D$ are connected together. The effective capacitance between $A$ and $C$ is (Assume capacitance of each pair of plates without dielectric is $C$):

MediumAP EAMCET 2017

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Medium

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The distance between the plates of a parallel plate capacitor is $d$. $A$ metal plate of thickness $d/2$ is introduced between the plates. The capacitance will then be

Easy

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$A$ parallel plate capacitor with square plates of side $L$ is filled with four dielectrics of dielectric constants $K_1, K_2, K_3, K_4$ arranged as shown in the figure. The effective dielectric constant $K$ will be

DifficultJEE MAIN 2019

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$A$ parallel plate capacitor is charged and then disconnected from the source of potential difference. If the plates of the capacitor are then moved farther apart by the use of an insulated handle,which one of the following is true?

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